Create an Optional_Base object whose contained value is initialized by forwarding from the specified value. Use the specified allocator to supply memory.
Declared in <bslstl_optional.h>
template<class t_ANY_TYPE>
Optional_Base(
std::allocator_arg_t,
allocator_type allocator,
BloombergLP::bslstl::Optional_ConstructFromForwardRef,
t_ANY_TYPE&& value);